Thanks for the pointers. Seems it something used by the System Browser, as it occurring whenever I try to do something with it. <br><br><div class="gmail_quote">On 27 November 2010 15:56, Casey Ransberger <span dir="ltr">&lt;<a href="mailto:casey.obrien.r@gmail.com">casey.obrien.r@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div bgcolor="#FFFFFF"><div><div>It looks like you have a nil object that&#39;s getting sent the message #categories. </div>
<div><br></div><div>If you dive in with the debugger, somewhere near the top, you should be able to find your nil object. Nil has a way of begetting nil sometimes, so you may need to walk down the stack tract to find original the source of the error. </div>
<div><br></div><div>If all else fails, you should be able to recover most if not all of your code from your .changes file.</div><div><div></div><div class="h5"><div><br>On Nov 27, 2010, at 4:24 AM, <a href="mailto:recursive68@gmail.com" target="_blank"></a><a href="mailto:recursive68@gmail.com" target="_blank">recursive68@gmail.com</a> wrote:<br>
<br></div><div></div><blockquote type="cite"><div><span style="font-family:arial, sans-serif;font-size:13px;border-collapse:collapse">Hi<div><br></div><div>I&#39;ve been using a Squeak 4.1 and Seaside 3.0 and I think I must have stuffed something up as now getting the following error:</div>

<div><br></div><div><div>MessageNotUnderstood: UndefinedObject&gt;&gt;categories</div><div>Proceed</div><div>Abandon</div><div>Debug</div><div>Create</div><div>UndefinedObject(Object)&gt;&gt;doesNotUnderstand: #categories</div>

<div>Browser&gt;&gt;messageCategoryList</div><div>PluggableListMorphPlus(PluggableListMorph)&gt;&gt;getList</div><div>PluggableListMorphPlus(PluggableListMorph)&gt;&gt;verifyContents</div><div>[] in Browser(Object)&gt;&gt;updateListsAndCodeIn:</div>

<div>Array(SequenceableCollection)&gt;&gt;do:</div><div>Browser(Object)&gt;&gt;updateListsAndCodeIn:</div><div>Browser(CodeHolder)&gt;&gt;updateListsAndCodeIn:</div><div>Browser(CodeHolder)&gt;&gt;modelWakeUpIn:</div><div>

PluggableSystemWindow(SystemWindow)&gt;&gt;activateWindow</div><div>PluggableSystemWindow(SystemWindow)&gt;&gt;activate</div><div>SystemWindow class&gt;&gt;noteTopWindowIn:</div><div>PluggableSystemWindow(SystemWindow)&gt;&gt;delete</div>

<div>PluggableSystemWindow&gt;&gt;delete</div><div>MorphicToolBuilder&gt;&gt;close:</div><div>Debugger&gt;&gt;debug</div><div>PluggableButtonMorphPlus(PluggableButtonMorph)&gt;&gt;performAction</div><div>PluggableButtonMorphPlus&gt;&gt;performAction</div>

<div>[] in PluggableButtonMorphPlus(PluggableButtonMorph)&gt;&gt;mouseUp:</div><div>Array(SequenceableCollection)&gt;&gt;do:</div><div><br></div><div>UndefinedObject(Object)&gt;&gt;doesNotUnderstand: #categories</div><div>

Browser&gt;&gt;messageCategoryList</div><div>PluggableListMorphPlus(PluggableListMorph)&gt;&gt;getList</div><div>PluggableListMorphPlus(PluggableListMorph)&gt;&gt;verifyContents</div><div>[] in Browser(Object)&gt;&gt;updateListsAndCodeIn:</div>

<div>Array(SequenceableCollection)&gt;&gt;do:</div><div>Browser(Object)&gt;&gt;updateListsAndCodeIn:</div><div>Browser(CodeHolder)&gt;&gt;updateListsAndCodeIn:</div><div>Browser(CodeHolder)&gt;&gt;modelWakeUpIn:</div><div>

PluggableSystemWindow(SystemWindow)&gt;&gt;activateWindow</div><div>PluggableSystemWindow(SystemWindow)&gt;&gt;activate</div><div>SystemWindow class&gt;&gt;noteTopWindowIn:</div><div>PluggableSystemWindow(SystemWindow)&gt;&gt;delete</div>

<div>PluggableSystemWindow&gt;&gt;delete</div><div>MorphicToolBuilder&gt;&gt;close:</div><div>Debugger&gt;&gt;debug</div><div>PluggableButtonMorphPlus(PluggableButtonMorph)&gt;&gt;performAction</div><div>PluggableButtonMorphPlus&gt;&gt;performAction</div>

<div>[] in PluggableButtonMorphPlus(PluggableButtonMorph)&gt;&gt;mouseUp:</div><div>Array(SequenceableCollection)&gt;&gt;do:</div><div><br></div></div><div>I would just use a new copy of the image but I need to fileout some package I&#39;ve written but this error is stopping me from doing so. Any ideas ?</div>

<div><br></div><div>Thanks</div></span>
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